\section{Glossary}

\begin{description}

\item [combine] \label{glos:combine} Add together two or more fields that are on the same domain; e.g., latent heat flux plus 
sensible heat flux on a T42 grid with the same land mask communication interval:  the time interval 
with respect to a component model exchanging data with the coupler. 
              
\item [domain] \label{glos:domain} Grid plus mask. 
              
\item [grid] \label{glos:grid} Component model coordinates without a mask; e.g.,  a T42 grid. 
              
\item [hybrid parallel] \label{glos:hybpar} A combination of messaging passing and threading. 
              
\item [map] \label{glos:map} Regrid; move a data field from one domain to another. 
              
\item [mask] \label{glos:mask} True/false flags associated with a specific grid; e.g., a land mask. 
              
\item [merge] \label{glos:merge} Take two or more fields of the same type (e.g., land, ocean, and ice surface temperatures), 
which are all on the same domain (e.g., all on a T42 grid, global domain), and the same number of 
corresponding cell fractions (fraction of land, ocean, and ice, which together sum to unity), and 
create one field ( e.g., (merged surface temperature) = (ice frac)*(ice T) + (ocn frac)*(ocn T) + 
(lnd frac)*(lnd T) ). 
              
\item [process split] \label{glos:procsplit} Time stepping strategy whereby when component models integrate thru a time interval, 
say [t1,t2], the only data available to the models corresponds to a previous time interval, [t0,t1];  
generally associated with concurrent component model execution. 
              
\item [reentrant] \label{glos:reentrant} A characteristic of a function which can be called concurrently by multiple threads without mishap. 
              
\item [regrid] \label{glos:regrid} Map; move a data field from one domain to another. 
              
\item [time split] \label{glos:timesplit} Time stepping strategy whereby when component models integrate thru a time interval, 
say [t1,t2], the data made available to some models may correspond to the time interval [t1,t2];  
generally associated with sequential component model execution.

\item [timestep] \label{glos:tstep} A model's internal integration increment in time. 

\end{description}












